Over-temperature detection device and projector system

Abstract

The application relates to an over-temperature detection device and a projector system. The over-temperature detection device utilizes a scheduling module to output first temperature information output by a first temperature sensing module and each second temperature information output by a second temperature sensing module in time, so that a processing module can receive the first temperature information and the second temperature information in time, and determine whether the working temperature of a projector device exceeds a safety temperature according to the first temperature information and the second temperature information. Thus, data transmission congestion caused by simultaneous transmission of all temperature information to the processing module is relieved, and the timeliness of projector temperature determination is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projector control, in particular to an over-temperature detection device and a projector system. BACKGROUND

[0002] The projector includes a light source module, a light engine and a projection objective lens. Generally, the light source module is the main heat generating element, and the temperature of the light source module is used as a criterion for determining the working temperature of the projector to ensure the safe operation of the projector. To eliminate the influence of the ambient temperature and accurately determine the temperature of the light source module of the projector, multiple temperature sensors are usually arranged to collect temperature data near the light source module, and then the collected temperature data is transmitted to a processor, and then the processor determines the abnormality of the working temperature of the projector according to the temperature data.

[0003] However, when multiple temperature sensors transmit temperature data to the processor, data transmission congestion may occur, thereby reducing the data transmission speed and affecting the timeliness of the temperature determination of the projector. SUMMARY

[0004] Therefore, it is necessary to provide an over-temperature detection device and a projector system capable of improving the timeliness of the temperature determination of the projector.

[0005] An over-temperature detection device applied to a projector device, comprising:

[0006] A first temperature sensing module for sensing an internal temperature inside a light source module and outputting first temperature information according to the internal temperature;

[0007] A second temperature sensing module for sensing temperatures of multiple position points outside the light source module and outputting second temperature information according to the temperatures of the position points;

[0008] A scheduling module connected with the first temperature sensing module and the second temperature sensing module respectively, for outputting the first temperature information and each second temperature information in time;

[0009] A processing module connected with the scheduling module, for determining whether the working temperature of the projector device exceeds a safe temperature according to the first temperature information and each second temperature information.

[0010] In one embodiment, the processing module is configured to:

[0011] determine whether the internal temperature of the light source module is abnormal according to the first temperature information;

[0012] determine whether the temperature of each position point is abnormal according to each second temperature information;

[0013] If the internal temperature is normal, and at most one of the location points has abnormal temperature or at least four of the location points have abnormal temperature, it is determined that the working temperature does not exceed the safety temperature.

[0014] In one of the embodiments, the processing module is further configured to:

[0015] determine whether the first temperature sensing module is abnormal according to the first temperature information;

[0016] If the first temperature sensing module is abnormal, and at least one of the location points has abnormal temperature, it is determined that the working temperature exceeds the safety temperature.

[0017] In one of the embodiments, the processing module is further configured to:

[0018] If at least two of the location points have abnormal temperature, and the internal temperature is abnormal, it is determined that the working temperature exceeds the safety temperature.

[0019] In one of the embodiments, the second temperature sensing module comprises:

[0020] a plurality of sensing units, each of which is connected to the scheduling module, and each of the sensing units is configured to correspondingly sense the temperature of each of the location points;

[0021] The over-temperature detection device further comprises:

[0022] a plurality of signal preprocessing modules, the sensing units are connected to the scheduling module through the signal preprocessing modules, and the signal preprocessing modules are configured to perform noise reduction or amplification processing on the second temperature information.

[0023] In one of the embodiments, the signal preprocessing module comprises an amplification unit, a noise reduction unit, and a switching unit, the amplification unit and the noise reduction unit are connected to the scheduling module, and the switching unit is connected to the amplification unit, the noise reduction unit, and the sensing unit, and is configured to turn on the conduction path between the sensing unit and the amplification unit or the noise reduction unit.

[0024] In one of the embodiments, each of the sensing units is arranged on the same outer side of the light source module housing, and is configured to sense the temperature of a plurality of location points on the outer side of the light source module housing.

[0025] A projector system comprising the over-temperature detection device described above; and

[0026] A projector device comprising:

[0027] a power module;

[0028] A central control module is connected with the power module and the processing module respectively, and is configured to receive the determination result of the processing module, and if the determination result is that the working temperature exceeds the safety temperature, control the power module to stop supplying power to the projector device.

[0029] In one of the embodiments, the processing module and the central control module are the same module.

[0030] In one of the embodiments,

[0031] The power module is connected with the processing module, and is configured to receive the determination result, and if the determination result is that the working temperature exceeds the safety temperature, stop supplying power to the projector device.

[0032] The above over-temperature detection device utilizes the scheduling module to output the first temperature information output by the first temperature sensing module and each second temperature information output by the second temperature sensing module in time, so that the processing module can receive the first temperature information and the second temperature information in time, and determine whether the working temperature of the projector device exceeds the safety temperature according to the first temperature information and each second temperature information, thus relieving the data transmission congestion caused by the simultaneous transmission of all temperature information to the processing module, and improving the timeliness of the projector temperature determination. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 The structural block diagram of the over-temperature detection device of an embodiment;

[0035] Figure 2 The structural block diagram of the over-temperature detection device of another embodiment;

[0036] Figure 3 The structural block diagram of the over-temperature detection device of another embodiment;

[0037] Figure 4 The structural schematic diagram of the light source module of an embodiment;

[0038] Figure 5 The structural block diagram of the over-temperature detection device of another embodiment;

[0039] Figure 6 The structural block diagram of the over-temperature detection device of another embodiment;

[0040] Figure 7 This is a structural block diagram of an over-temperature detection device according to another embodiment;

[0041] Figure 8 This is a structural block diagram of an over-temperature detection device according to another embodiment. Detailed Implementation

[0042] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0044] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0045] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0046] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0047] Figure 1 This is a structural block diagram of an over-temperature detection device according to one embodiment. The over-temperature detection device is applied to projector equipment, such as... Figure 1As shown, the system includes a first temperature sensing module 100, a second temperature sensing module 200, a scheduling module 300, and a processing module 400. The first temperature sensing module 100 senses the internal temperature of the light source module and outputs first temperature information based on the internal temperature. The second temperature sensing module 200 senses the temperature at multiple locations outside the light source module and outputs second temperature information based on the temperature at each location. The scheduling module 300 is connected to both the first temperature sensing module 100 and the second temperature sensing module 200 and is used to output the first temperature information and each of the second temperature information in a time-sharing manner. The processing module 400 is connected to the scheduling module 300 and is used to determine whether the operating temperature of the projector exceeds the safe temperature based on the first temperature information and each of the second temperature information.

[0048] The first temperature sensing module 100 may include a temperature sensor disposed inside the light source module, and the first temperature information may be the temperature value output by the temperature sensor; the first temperature sensing module 100 may also include a temperature switch, and the first temperature information may be a current value. When the temperature does not exceed the set temperature, the contacts of the temperature switch close and output a non-zero current value; when the temperature exceeds the set temperature, the contacts open and the output current value may be zero.

[0049] The second temperature sensing module 200 may include multiple sensing units 201, each of which may include a temperature sensor or a temperature switch to sense the temperature at multiple locations and obtain second temperature information characterizing the temperature at each location. Alternatively, the second temperature sensing module 200 may include multiple temperature sensors, in which case the second temperature information is a temperature value; or the second temperature sensing module 200 may include multiple temperature switches, in which case the second temperature information is a current value; or the second temperature sensing module 200 may include both a temperature sensor and a temperature switch, in which case the second temperature information may be either a temperature value or a current value.

[0050] The scheduling module 300 can transmit the first temperature information and each of the second temperature information in a time-division manner. For example, a preset duration can be set, and the temperature information can be transmitted according to the preset duration. The preset duration can be determined based on the time required for each temperature information to be transmitted.

[0051] In addition, the scheduling module 300 can store an information transmission priority list. When two or more temperature information are received at the same time, it can transmit the temperature information in sequence according to the priority list.

[0052] When the scheduling module 300 transmits the first temperature information and each of the second temperature information in a time-division manner, the processing module 400 can store the temperature information as soon as it is received. After receiving and storing all the temperature information, it can then determine whether the operating temperature of the projector exceeds the safe temperature based on all the temperature information. It can be understood that by combining the temperature detection results from the inside of the light source module and the temperatures at multiple locations outside the light source module when determining whether the safe temperature has been exceeded, the influence of ambient temperature on the determination result can be eliminated, thus improving the accuracy of the determination.

[0053] The over-temperature detection device of this invention utilizes the scheduling module 300 to output the first temperature information output by the first temperature sensing module 100 and the second temperature information output by the second temperature sensing module 200 in a time-division manner. This allows the processing module 400 to receive the first and second temperature information in a time-division manner and determine whether the operating temperature of the projector exceeds the safe temperature based on the first and second temperature information. This alleviates the data transmission congestion caused by all temperature information being transmitted to the processing module 400 simultaneously, and improves the timeliness of the projector temperature determination. At the same time, since the detection results of the temperature inside the light source module and the temperature at multiple locations outside the light source module are combined when determining the temperature anomaly, the accuracy of the determination result can be improved.

[0054] In one embodiment, the number of location points may be at least four, and the distance between each location point may be greater than a distance threshold.

[0055] The number of location points can be set as needed; for example, more location points can be set to improve detection accuracy. Setting the distance between each location point to be greater than a distance threshold can increase the sensing range and avoid the influence of insignificant temperature differences between adjacent areas on the judgment result, thereby improving detection accuracy.

[0056] In one embodiment, the processing module 400 can be used to determine whether the internal temperature of the light source module is abnormal based on the first temperature information; and to determine whether the temperature of each location point is abnormal based on each second temperature information; if the internal temperature is normal, and the temperature of at most one location point is abnormal or the temperature of at least four location points is abnormal, then it is determined that the operating temperature has not exceeded the safe temperature.

[0057] In this embodiment, the first temperature information can be a current value. The processing module 400 can determine whether the internal temperature of the light source module is abnormal based on the current value. For example, if the current value is 0 within a preset time period, the internal temperature of the light source module is determined to be abnormal. In another embodiment, the first temperature information can also be a temperature value. The processing module 400 can determine whether the internal temperature of the light source module is abnormal based on the temperature value. For example, if the temperature value exceeds a set temperature threshold within a preset time period, the internal temperature of the light source module is determined to be abnormal.

[0058] It is understandable that if the internal temperature is normal and the temperature at most one location is abnormal, this may be a case of local high temperature in the light source module. Since the light source module is equipped with a cooling device, the local temperature will return to normal after the cooling device has been working for a period of time. Therefore, it can be determined that the operating temperature of the projector equipment has not exceeded the safe temperature. When the internal temperature is normal and the temperature at least four locations is abnormal, it indicates that the second temperature information sensed by the second temperature sensing module 200 has been affected by the external ambient temperature, while the first temperature information sensed by the first temperature sensing module 100 can be used to reflect the operating temperature of the projector equipment. That is, the operating temperature has not exceeded the safe temperature.

[0059] In one embodiment, the processing module 400 is further configured to determine whether the first temperature sensing module 100 is malfunctioning based on the first temperature information; if the first temperature sensing module 100 is malfunctioning and the temperature at at least one location point is malfunctioning, then it is determined that the operating temperature exceeds the safe temperature.

[0060] It is understandable that when the first temperature sensing module 100 malfunctions and the temperature at at least one location point is abnormal, it may be due to a fault in the laser tube. For example, the beam may deviate, causing the second temperature sensing module 200 to be damaged, or the current drive may be abnormal, causing the laser tube to work under excessively high current for a long time. Therefore, in order to ensure the safe use of the projector equipment, it can be determined that the operating temperature exceeds the safe temperature.

[0061] Specifically, if the internal temperature is normal within the preset time period, and the temperature at most one location point is abnormal, then the working temperature is determined to be within the safe temperature range.

[0062] Specifically, the preset duration can be no more than 1 minute, no more than 5 minutes, or no more than 10 minutes. The specific preset duration can be selected according to actual needs, and is generally determined based on the cooling efficiency of the light source module.

[0063] Specifically, if the internal temperature is normal and at most one location point has an abnormal temperature, the operating temperature is determined to be within the safe temperature range. In one embodiment, if there is an abnormal temperature at one location point, the processing module is further configured to acquire the temperature data of the location point with the abnormal temperature within a first preset time range; if the temperature of these location points within the first preset time range is still abnormal, or the temperature data of these location points is on an upward trend, the operating temperature is determined to be outside the safe temperature range, and an abnormal alarm can be triggered.

[0064] It is understandable that when the internal temperature is normal and only one location has an abnormal temperature, in order to further determine whether this situation will affect the normal operation of the projector, the temperature data of the location with the abnormal temperature can be continuously acquired within a first preset time range from the current moment. If the temperature of the location is still abnormal within the first preset time range, or the temperature of the location is on the rise, it indicates that there may be beam deviation, circuit board overload, or cooling module failure. In order to ensure the normal operation of the projector, it can be determined that the operating temperature exceeds the safe temperature, and an abnormal alarm can be triggered.

[0065] Specifically, if the internal temperature is normal, but the temperature at at least four locations is abnormal, the processing module can further be used to acquire and determine whether to trigger a warning condition based on the internal temperature and / or the temperature at the locations with abnormal temperatures within a second preset time range. If the warning condition is triggered, it is determined that the operating temperature exceeds the safe temperature. The warning condition can be at least one of the following: the internal temperature does not remain normal within the second preset time range, the temperature at the locations with abnormal temperatures continues to rise within the second preset time range, or the temperature at the locations with abnormal temperatures decreases within the second preset time range. The specific warning condition can also be set according to actual needs, for example, it can be determined based on the cooling efficiency of the light source module.

[0066] In one embodiment, the processing module 400 can determine whether the first temperature sensing module 100 is normal based on the first temperature information. For example, if the first temperature information shows large and irregular fluctuations, it can be determined that the first temperature sensing module 100 is abnormal.

[0067] In one embodiment, the processing module 400 is further configured to determine that the operating temperature exceeds the safe temperature if the temperature at at least two location points is abnormal and the internal temperature is abnormal.

[0068] It is understandable that if the temperature at at least two locations is abnormal and the internal temperature is abnormal, the operating temperature is determined to be outside the safe temperature range in order to ensure the safe use of the projector equipment.

[0069] It should be noted that in some cases, the first temperature sensing module inside the light source module may malfunction, meaning its detection data is unusable. This could be due to the first temperature sensing module being disconnected, displaying abnormal detection data, or experiencing excessive communication noise. In this situation, the first temperature sensing module inside the light source module is essentially missing or not configured, thus relying on other temperature detection methods. Therefore, if the temperature is abnormal at at least two locations, and the internal temperature is also abnormal, the operating temperature is determined to have exceeded the safe temperature range.

[0070] In one embodiment, the second temperature sensing module 200 includes a plurality of sensing units 201, such as Figure 2As shown, each sensing unit 201 is connected to the scheduling module 300 to sense the temperature at each location point. The over-temperature detection device also includes multiple signal preprocessing modules 500. The sensing unit 201 is connected to the scheduling module 300 through the signal preprocessing module 500, which is used to perform noise reduction or amplification processing on the second temperature information. It can be understood that by setting the signal preprocessing module 500 to perform noise reduction or amplification processing on the second temperature information, the accuracy of the temperature anomaly determination by the processing module 400 can be improved.

[0071] In one embodiment, the signal preprocessing module 500 includes an amplification unit 501, a noise reduction unit 502, and a switching unit 503, such as Figure 3 As shown, the amplification unit 501 and the noise reduction unit 502 are respectively connected to the scheduling module 300, and the switching unit 503 is respectively connected to the amplification unit 501, the noise reduction unit 502 and the sensing unit 201, and is used to conduct the conductive path between the sensing unit 201 and the amplification unit 501 or the noise reduction unit 502.

[0072] The amplification unit 501 amplifies the second temperature information, the noise reduction unit 502 reduces the noise of the second temperature information, and the switching unit 503 selects whether to turn on the amplification unit 501 or the noise reduction unit 502. The amplification unit 501 may include an operational amplifier.

[0073] In one embodiment, the signal preprocessing module 500 may further include an analog-to-digital conversion unit, which is connected to the amplification unit 501, the noise reduction unit 502 and the scheduling module 300 respectively, and is used to perform analog-to-digital conversion on the amplified or noise-reduced second temperature information.

[0074] In one embodiment, each sensing unit 201 is disposed on the same outer side of the light source module housing, and is used to sense the temperature at multiple locations on the outer side of the light source module housing.

[0075] It is understandable that the structural diagram of the light source module can be as follows: Figure 4 As shown, its housing may include multiple sides, and each sensing unit 201 is disposed on the same outer side of the housing of the light source module, thereby sensing the temperature of multiple location points (circular filled area in the figure) on the outer side of the housing of the light source module. This can cover multiple locations on the side and determine the temperature of each location on the side. Furthermore, each sensing unit 201 is generally connected to the processing module 400 by a line. By sensing the temperature of location points on the same side, the wiring between the sensing unit 201 and the processing module 400 can be facilitated.

[0076] In one embodiment, the over-temperature detection device may further include a data communication module 806, such as... Figure 5As shown, the data communication module 806 is connected to the scheduling module 300, the processing module 400, and the central processing module 400 or power module of the projector equipment, respectively. It is used to transmit the first temperature information and the second temperature information to the scheduling module 300, so that they can be transmitted to the processing module 400 through the scheduling module 300. The processing module 400 is also used to send the judgment result to the central processing module 400 or power module of the projector equipment in sequence through the scheduling module 300 and the data communication module 806, so as to instruct the projector equipment to disconnect the power supply.

[0077] In one embodiment, the over-temperature detection device may further include a storage module 700, which is connected to the scheduling module 300 and the processing module 400 respectively. The storage module 700 is used to receive and store the first temperature information output by the first temperature sensing module 100 and the second temperature information output by the second temperature sensing module 200, and is also used to store the temperature threshold and transmit it to the processing module 400.

[0078] In one embodiment, the number of sensing units 201 is the same as the number of location points to be detected, for example, at least four.

[0079] In one embodiment, the sensing unit 201 may be a temperature sensor or a temperature switch.

[0080] Specifically, the second temperature sensing module 200 may include a temperature sensor and a temperature switch, wherein at least one temperature sensor is connected to the scheduling module 300 through the temperature switch, the temperature sensor is used to sense the temperature of the first location point and output the temperature value of the first location point, and at least one temperature switch is used to sense the temperature of the second location point and output the temperature value to the scheduling module 300 according to the temperature of the second location point; wherein the first location point and the second location point are any two of a plurality of location points.

[0081] It is understood that when the temperature sensor is connected to the scheduling module 300 via a temperature switch, the second temperature information may include a temperature value. The temperature sensor is used to sense the temperature of the first location point and output the temperature value of the first location point. The temperature switch is used to sense the temperature of the second location point. If the temperature of the second location point is less than a set threshold, the temperature value is received and output to the scheduling module 300, and then forwarded to the processing module 400. The first location point and the second location point can be any two of multiple location points. The processing module 400 is also used to determine that the temperature of the first location point is abnormal if it receives a temperature value and the temperature value is greater than the temperature threshold within a preset time period; if no temperature value is received within the preset time period, the temperature of the second location point is abnormal. It is understood that for a single first location point, if the temperature value of the first location point exceeds the temperature threshold within a preset time period, it indicates that the temperature of the first location point exceeds the temperature threshold, and the processing module 400 can determine that the temperature of the first location point is abnormal; if no first temperature value is received within the preset time period, it indicates that the temperature switch is open and the temperature of the second location point exceeds the set threshold of the temperature switch, and the temperature of the second location point can be determined to be abnormal. The temperature threshold can be 40°C, and the set threshold can be 45°C. In one embodiment, the set threshold can be stored in the storage module 700.

[0082] Since the temperature sensor is a metal resistance temperature measuring device and the temperature switch is a hot surface resistance temperature measuring device, their temperature measurement principles are different. By indirectly connecting the temperature sensor to the processing module 400 through the temperature switch, the simultaneous failure of a single type of device can be avoided. In addition, if the processing module 400 receives a temperature value, it indicates that the temperature switch contacts are closed and the temperature at the second position point is less than the set threshold. At this time, the processing module 400 can determine that the temperature at the second position point is normal and can determine the temperature at the first position point based on the relationship between the temperature value and the temperature threshold. Conversely, if the processing module 400 does not receive a temperature value, it indicates that the temperature switch contacts are open and the temperature at the second position point is greater than the set threshold. At this time, the temperature at the second position point can be determined to be abnormal. This increases the flexibility of the circuit connection and enables the determination of abnormalities at both the first and second position points.

[0083] In addition to the temperature sensors and temperature switches that are interconnected, the remaining temperature sensors and / or temperature switches in the second temperature sensing module 200 are directly connected to the scheduling module 300. The temperature sensors are used to output temperature values, and the temperature switches are used to output current values.

[0084] In one embodiment, the second temperature sensing module 200 may include multiple temperature switches for detecting the temperature of each location point and outputting a current value. After receiving the current value through the forwarding of the scheduling module 300, the processing module 400 is further used to determine that the temperature of the location point is abnormal if the temperature value exceeds the temperature threshold within a preset time period.

[0085] In one embodiment, the second temperature sensing module 200 may include multiple temperature sensors for detecting the temperature of each location point and outputting temperature values. After receiving the temperature values ​​via the forwarding of the scheduling module 300, the processing module 400 is further configured to determine that the temperature of the location point is abnormal if the current value is 0 within a preset time period.

[0086] The preset duration ensures that the temperature at the location point tends to a steady state.

[0087] This invention also provides a projector system, including the over-temperature detection device of any of the above embodiments and a projector device. The projector device includes a power supply module and a central control module, such as... Figure 6 As shown, the central control module is connected to the power supply module and the processing module 400 respectively, and is used to receive the judgment result of the processing module 400. If the judgment result is that the working temperature exceeds the safe temperature, the power supply module is controlled to stop supplying power to the projector equipment.

[0088] The projector system of this invention includes the over-temperature detection device of the above embodiment. Its beneficial effects can be referred to the above over-temperature detection device embodiment, which will not be repeated here.

[0089] In one embodiment, the processing module 400 and the central control module are the same module, thus integrating temperature determination and projection control, reducing component costs, and allowing the data communication module 806 to be replaced separately when it fails, without needing to adjust the processing module 400.

[0090] In one embodiment, when a data communication module 806 is included, the central control module can be connected to the data communication module 806 to receive first temperature information, second temperature information, and judgment results.

[0091] The central control module can be a microcontroller (such as ST series chips, SST series chips, STC series chips, etc.), CPU, EROM, or other chips with computing and processing functions.

[0092] In one embodiment, such as Figure 7 As shown, the power supply module is connected to the processing module 400 and is used to receive the judgment result. If the judgment result indicates that the operating temperature exceeds the safe temperature, the power supply to the projector will be stopped. This direct control of the power supply module by the processing module 400 avoids safety accidents caused by power outages due to central control module malfunctions. The power supply module can be connected to the processing module 400 via the data communication module 806.

[0093] The power supply module can be a constant current source or a constant voltage source, and the voltage value can be 24V or 12V.

[0094] In one embodiment, such as Figure 8 As shown, the projector may also include a light source module (not shown), a light engine (not shown), a cooling module 803 connected to the central control module, a light source current control module 804, a light intensity control module 805, and a communication module 806. The cooling module 803 is used to maintain the operating temperature of the laser tube in the light source module; the light source current control module 804 is used to control the current of the laser tube in the light source; the light intensity control module 805 is used to maintain the light intensity and RGB color ratio of the laser tube; and the communication module 806 is used for data communication between the various modules and communication with other external modules. Typically, the projector also has an interface module (not shown) connected to the communication module 806 to communicate with the outside world through the interface module.

[0095] The light source current control module 804 can be a control module including a processing chip, or a circuit capable of generating a constant current, to ensure that the current required for the laser tube to operate is provided.

[0096] The light intensity control module 805 can be connected to the light intensity sensor module (not shown in the figure). Based on the sensor's test data, it determines the luminous intensity of the corresponding laser tube and then sends the luminous intensity of the laser tube to the central control module. The central control module determines the operating current of each laser tube based on the luminous intensity and then controls the light source current control module 804 to generate the corresponding operating current for each laser tube. The light intensity control module 805 may include a control module for a processing chip or other circuit structures that can be used to control the light intensity sensor.

[0097] The cooling module 803 may include a circulating water chiller, a semiconductor cooling chip, or other cooling devices for cooling the laser tube and maintaining the laser tube temperature stability.

[0098] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0099] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0100] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An over-temperature detection device, characterized in that, Applied to projector equipment, including: The first temperature sensing module is used to sense the internal temperature inside the light source module and output first temperature information based on the internal temperature. The second temperature sensing module is used to sense the temperature of multiple locations outside the light source module and output second temperature information based on the temperature of the locations. The scheduling module is connected to the first temperature sensing module and the second temperature sensing module respectively, and is used to output the first temperature information and each of the second temperature information in a time-division manner. The scheduling module stores an information transmission priority list. When two or more temperature information are received at the same time, the temperature information is transmitted in a time-division manner according to the priority list. The processing module is connected to the scheduling module and is used to determine whether the operating temperature of the projector exceeds the safe temperature according to the first temperature information and each of the second temperature information. The processing module is further configured to: When the internal temperature is normal and only one location point has an abnormal temperature, the temperature data of the location point with the abnormal temperature will continue to be acquired within a first preset time range from the current moment. If the temperature of the location point is still abnormal or the temperature of the location point is on the rise within the first preset time range, it is determined that the working temperature exceeds the safe temperature. When the internal temperature is normal and the temperature at least four locations is abnormal, the internal temperature and / or the temperature at the locations with abnormal temperatures are obtained within a second preset time range. The warning condition is determined based on the temperature change trend. If the warning condition is triggered, the working temperature is determined to be outside the safe temperature range.

2. The over-temperature detection device according to claim 1, characterized in that, The processing module is used for: Determine whether the internal temperature of the light source module is abnormal based on the first temperature information; Determine whether the temperature at each of the locations is abnormal based on the second temperature information; If the internal temperature is normal, and the temperature at most one of the locations is abnormal or the temperature at least four of the locations is abnormal, then it is determined that the operating temperature has not exceeded the safe temperature.

3. The over-temperature detection device according to claim 2, characterized in that, The processing module is also used for: Determine whether the first temperature sensing module is malfunctioning based on the first temperature information; If the first temperature sensing module malfunctions, and the temperature at at least one of the locations is abnormal, then the operating temperature is determined to exceed the safe temperature.

4. The over-temperature detection device according to claim 2, characterized in that, The processing module is also used for: If the temperature at at least two of the locations is abnormal, and the internal temperature is also abnormal, then the operating temperature is determined to exceed the safe temperature.

5. The over-temperature detection device according to claim 1, characterized in that, The second temperature sensing module includes: Multiple sensing units are connected to the scheduling module, and each sensing unit is used to sense the temperature of each location point in a corresponding manner. The over-temperature detection device further includes: Multiple signal preprocessing modules are provided. The sensing unit is connected to the scheduling module through the signal preprocessing modules. The signal preprocessing modules are used to perform noise reduction or amplification processing on the second temperature information.

6. The over-temperature detection device according to claim 5, characterized in that, The signal preprocessing module includes an amplification unit, a noise reduction unit, and a switching unit. The amplification unit and the noise reduction unit are respectively connected to the scheduling module. The switching unit is respectively connected to the amplification unit, the noise reduction unit, and the sensing unit, and is used to conduct the conductive path between the sensing unit and the amplification unit or the noise reduction unit.

7. The over-temperature detection device according to claim 5, characterized in that, Each of the sensing units is disposed on the same outer side of the housing of the light source module, and is used to sense the temperature at multiple locations on the outer side of the housing of the light source module.

8. A projector system, characterized in that, Includes the over-temperature detection device as described in any one of claims 1 to 7; as well as Projection equipment, including: Power module; The central control module is connected to both the power supply module and the processing module. It receives the judgment result from the processing module. If the judgment result indicates that the operating temperature exceeds the safe temperature, it controls the power supply module to stop supplying power to the projector.

9. The projector system according to claim 8, characterized in that, The processing module and the central control module are the same module.

10. The projector system according to claim 8, characterized in that, The power supply module is connected to the processing module and is used to receive the determination result. If the determination result is that the operating temperature exceeds the safe temperature, the power supply to the projector equipment is stopped.

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